Tracer measurements during long-term circulation of the Rosemanowes HDR geothermal system

摘要: Circulation experiments have been in operation for over two years the artificially stimulated hot dry rock (HDR) doublet of Camborne School Mines (CSM) research facility Cornwall, England. During that period tracer tests run at intervals using inert and reactive compounds. Initially, results investigations showed active volume (indicated by modal median volumes) circulating system was dormant. Then, after a sustained oscillation, notable increases were observed which depended on both subsequent flow rate changes circulation time. these dynamic had almost reached optimum values when downhole pump introduced production well. The drawdown well caused reduction volume, whilst remained same. Since then, has unchanged irresponsive to time rate. confirm increasing chemical reaction with correlate qualitatively opening newer hotter pathways within reservoir. However, repeated logs throughout identified paths depleted thermally; discrepancy can more » be explained geometry preferential downward reservoir growth. « less